38521388857 has 24 divisors (see below), whose sum is σ = 46540177152. Its totient is φ = 31756989600.

The previous prime is 38521388831. The next prime is 38521388863. The reversal of 38521388857 is 75888312583.

It is not a de Polignac number, because 38521388857 - 2³⁵ = 4161650489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38521388827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169807 + ... + 325387.

It is an arithmetic number, because the mean of its divisors is an integer number (1939174048).

Almost surely, 2^38521388857 is an apocalyptic number.

It is an amenable number.

38521388857 is a deficient number, since it is larger than the sum of its proper divisors (8018788295).

38521388857 is a wasteful number, since it uses less digits than its factorization.

38521388857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155789 (or 155782 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 58.

The spelling of 38521388857 in words is "thirty-eight billion, five hundred twenty-one million, three hundred eighty-eight thousand, eight hundred fifty-seven".